Chain A ( F101 F102 G103 R104 T105 S106 N107 G108 K109 S110 T111 V112 I113 N114 A115 K120 L122 P123 S124 G125 I126 G127 H128 T129 T130 N131 C132 L134 V160 N161 L163 A164 H165 A166 L167 H168 Q169 D170 L173 M198 D199 S200 P201 G202 V226 N258 R259 A306 K307 E308 L310 N311 )